/*
 * Copyright 2013 University of Padua, Italy
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package it.dei.unipd.healthservice.database;

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Date;
import java.util.ArrayList;
import java.util.List;
import it.dei.unipd.healthservice.resource.*;

/**
 * Visualizza i prodotti che compongono un ordine
 * 
 * @author Giorgio Vitale
 * @version 1.00
 */
public class ViewComposizioneOrdiniFornitoreDatabase {
	/**
	 * Interrogazione al database
	 */
	private static final String STATEMENT = "SELECT m.idmateriaprima AS idmateriaprima, m.nome AS nome, " +
						"m.unitamisura AS unitadimisura, m.descrizione AS descrizione, r.qta AS qta " +
						"FROM ordinefornitura AS o INNER JOIN riguarda AS r " +
						"ON(o.idordinefornitura=r.idordinefornitura) " +
						"INNER JOIN materiaprima AS m ON(r.idmateriaprima=m.idmateriaprima) " +
						"WHERE o.idordinefornitura=? " +
						"ORDER BY nome, idmateriaprima;";
	/**
	 * Connessione al database
	 */
	private final Connection con;
	/**
	 * ordine da ricercare
	 */
	private final int idordine;
	/**
	 * Risultati della ricerca
	 */
	private final List<ElementoOrdineFornitura> materiali;
	
	/**
	 * Ricerca tutti gli elementi di un ordine
	 * 
	 * @param con connessione al database.
	 * @param idordinefornitura ordine da cercare
	 */
	public ViewComposizioneOrdiniFornitoreDatabase(Connection con, int idordinefornitura) {
		this.con = con;
		materiali = new ArrayList<ElementoOrdineFornitura>();
		this.idordine = idordinefornitura;
	}
	/**
	 * Cerca gli elementi
	 * 
	 * @return una lista di materiali.
	 * @throws SQLException
	 *             in caso di problemi nell'accesso al database.
	 */
	public List<ElementoOrdineFornitura> search() throws SQLException {

		PreparedStatement pstmt = null;
		ResultSet rs = null;

		try {
			pstmt = con.prepareStatement(STATEMENT);
			pstmt.setInt(1, idordine);
			rs = pstmt.executeQuery();
			while (rs.next())
				try{
					materiali.add(new ElementoOrdineFornitura(
									new MateriaPrima(rs.getInt("idmateriaprima"), rs.getString("nome"),
												rs.getString("unitadimisura"), rs.getString("descrizione")), 
									rs.getInt("qta")));
				}catch (IllegalArgumentException e){}
		}
		finally {
			if (rs != null)
				rs.close();
			if (pstmt != null)
				pstmt.close();
			con.close();
		}
		return materiali;
	}
}